In Comedy Cellar’s infancy in New York, would-be patrons called the club to ask who the night’s headliner would be.

A bartender would take that call, offering a promise instead of an answer.

“From the beginning, we’d get the calls, ‘Who is appearing tonight?’ and we’d tell the bartenders to say, ‘Come down. If you don’t have a good time, we’ll give you your money back,’ ” says Comedy Cellar co-founder Bill Grundfest, who is opening an outpost of the famous Greenwich Village club at the Rio this week. “We still tell people to trust us to put on a good show. People always called asking for names to recognize, but instead we built a brand loyalty.”

In that process, many names that rose from the club since its inception in 1982 became famous, Dave Chappelle, Ray Romano, Chris Rock, Sarah Silverman and Jon Stewart among them. Pre-scandal Louis C.K. has been among the Comedy Cellar alumni royalty, centering his FX series, “Louie,” at the underground haunt (today, his name is never mentioned or listed among the greats who came out of the club showcased on national TV).

Entering what starts as a five-year contract with Caesars Entertainment at the Rio, Comedy Cellar kicks off its Las Vegas residency Thursday night. The lineup: Mo Amer (who has opened for Chappelle and was cast in HBO’s “Crashing”), Kyle Dunnigan (a regular on Howard Stern SiriusXM show and writer/performer on “Inside Amy Schumer”); Nathan Macintosh (a regular on “The Late Show with Stephen Colbert” on CBS and “Conan” on TBS), and Jessica Kirson (“The Comedian,” “The Apprentice” and “The Tonight Show” among her credits). Mark Cohen, from “Louie” and “The Sarah Silverman Program” is the weekly host.

That lineup is set for shows through this weekend, nightly at 7 p.m. and 9 p.m., with an additional 11 p.m. show Saturday. The format is for a Wednesday headliner — next week it’s Steve Byrne, who has made 10 appearances on “The Tonight Show” and has recorded concert specials on Comedy Central — followed by the five-comic lineup on Thursdays through Sundays. (Click here for the extended schedule.)

Comedy Cellar is, primarily, a small business that has made it big. Grundfest and the late Manny Dworman opened the original Comedy Cellar in the early 1980s. Dworman’s son, Noam, eventually stepped aboard as co-owner. Grundfest and Dworman are hoping to carry Comedy Cellar’s strong brand and lineage to success at the Rio.

The two club vets have totally overhauled the former Kings Room space (where Eddie Griffin once starred) to reflect the New York club’s motif.

The venue seats 250. As Grundfest says, “It’s the perfect size. We’ve taken Comedy Cellar from New York and moved it here, and the shows will also move from New York to Las Vegas.”

Dworman says he had the idea to expand to Las Vegas about five years ago.

“I was walking through New York-New York, and it had all these businesses from the Village,” Dworman says. “The only thing they didn’t have in the whole casino was Comedy Cellar.” But the hotel is owned by MGM Resorts, whose premiere comedy club is Brad Garrett’s Comedy Club at MGM Grand and who also stages the popular star lineup Aces of Comedy at The Mirage.

The most significant challenge to opening Comedy Cellar in Las Vegas is establishing the club’s impressive history in a new city.

“We have a well-established brand if you know comedy and you know New York,” Grundfest says. “But Vegas is a new town, and this is a new business. We’re a destination in New York — we turned away between 5,000-6,000 people last week who couldn’t get into our club. Now we need to re-create that kind of brand trust. That’s where the challenge is.”

The Rio club is not to be a developmental ground for rising comics. Those who appear in Las Vegas will already be well-known by the time they are booked.

“We’re getting comedians who are on ‘Conan,’ ‘Colbert,’ who have had Netflix specials, have been on ‘Last Comic Standing’ and who have headlined at the Improvs and those types of clubs around the country,” Grundfest says. “We’re catching people who have their own followings, who are good enough to be big stars but are not quite there yet.

“If we were opening this club six years ago, you’d see Amy Schumer, Michelle Wolf, Hasan Minhaj, even Aziz Ansari, on our stage. Comedy Cellar is constantly churning out comics who make it big, huge.”

The operators expect — no, promise — big stars to drop into Comedy Cellar. Those who perform at the Colosseum at Caesars Palace and The Mirage are characteristically fond of clubs, and also fellow comedians. Comics tend to run in clusters, and the bar at the entrance is designed to be a confab area for these busy stand-ups.

That’s a New York quality, as is the idea of featuring many comics on a single bill, to create a “critical mass of comics,” as Dworman calls it. And no other Vegas comedy club trots out five comedians in a single show.

“That’s what we do, and hey, our model might not work,” says Dworman, as Grundfest cuts in with, “That’s the spirit! Open with that — it might not work!”

Dworman laughs, but is serious about this point.

“I don’t know, is it old-fashioned to think that it can work if you’re doing it right? We think it will work great,” he says. “But if it doesn’t, you won’t see the Comedy Cellar polluting its own name by falling into a lower-quality show. We’d rather close, and that’s the truth. If it’s not the Comedy Cellar that we do in New York, it’s not going to be us.”

Sparrow + Wolf’s New Year’s Eve party was a sort of official unveiling of its newly renovated space. (Al Mancini/Las Vegas Review-Journal)

Las Vegas NYE Fireworks - VIDEO

The full show: A spectacular view from the rooftop of the Trump International Hotel as 80,000 pyrotechnics illuminated the Las Vegas Strip at the stroke of midnight. Fireworks by Grucci choreographed launches from the Stratosphere, the Venetian, Treasure Island, Caesars Palace, Planet Hollywood, Aria and MGM Grand.

Debra Kelleher Of The Stirling Club

Debra Kelleher, DK Hospitality President talks with Johnny Kats about the reopening of the Stirling Club.

Richard Ditton Of The Stirling Club

Richard Ditton, an investment partner of the Stirling Club talks with Johnny Kats about the reopening of the club.

NYE at the Stirling Club

John Katsilometes reports from the reopening of the Stirling Club on New Year's Eve 2018.

Michael Stapleton of the Stirling Club

Michael Stapleton, COO of the Stirling Club talks with Johnny Kats about the reopening of the club.

Recap the Countdown on Fremont Street — VIDEO

Nearly 40,000 people packed Fremont Street to enjoy America's Party Downtown. As the tradition stands, Las Vegas Mayor Carolyn Goodman counted down the clock on the 3rd Street Stage, alongside her husband and former mayor, Oscar Goodman.

New Year's Eve live from the Las Vegas Strip Bellagio Fountains - Video

Reporter Aaron Drawhorn near the Bellagio Fountains as hundreds of thousands gather to celebrate New Year's Eve in Las Vegas

Ryan Reaves describes the flavors in Training Day beer

Ryan Reaves talks about the flavor of Training Day, the new beer from 7Five Brewing that was launched at the PKWY Tavern on West Flamingo Road. (Al Mancini/Las Vegas Review-Journal)

Ryan Reaves describes his new beer

Golden Knights winger Ryan Reaves talks about his new beer from 7Five Brewing at a launch party at PKWY Tavern on West Flamingo Road. (Al Mancini/Las Vegas Review-Journal)

Vegas' five biggest NYE concerts

Imagine Dragons at The Chelsea at The Cosmopolitan of Las Vegas, Lady Gaga at The Park Theater at Park MGM, Maroon 5 at the Mandalay Bay Events Center, Bruno Mars at T-Mobile Arena, and Tenacious D at The Joint at the Hard Rock Hotel & Casino.

Celebrate New Years Day, Hangover Day and Bloody Mary Day at Cabo Wabo

Celebrate New Years Day, Hangover Day and Bloody Mary Day at Cabo Wabo (Janna Karel Las Vegas Review-Journal)

Michael Symon, chef and owner of Mabel's BBQ, talks about his first Las Vegas restaurant